Disturbing. Most....disturbing.

I'm not kidding. Take a look at this, if you have'nt already, and you'll know what I'm talking about. It makes F.E.A.R (or for that matter, the infamous stalker car in HL2: Episode One) seem like PG-13 material.
I don't have the patience to provide a synopsis here, and the video does a great job anyway - so just go ahead and watch it.
It suffices to say that a retro psychadelic look, little girls, and a decaying underwater utopia form an unsettling combination for insane phychological horror.

This is one game I'm not looking forward to play.